The environmental allergist I saw, Dr. Wm Rea in Dallas, Texas,
told me every person he tested for chlorine who had had polio
tested allergic to chlorine. When he tested me my whole left side
of my body became too weak to walk or raise my arm .... I was
suddenly surrounded by three nurses till I 'came out of it' b/c it
also affected my breathing, altho I was too brain-fogged at that
point  to care much about anything. I had polio in 1951 at age
6. Rehab included a lot of pool time. Too much chlorine?

Marsha in Texas